tbh I'm not sure how great any of them would feel. I hear a bunch of people saying how great it feels but having held one it just doesn't seem like it would feel good unless you were constantly lubing up

Ok, I got the one with the little spikes...The wavy part on the side makes NO SENSE, it just got in the way, so I cut it off. The spikes need to be longer relative to the case of the toys. I'll stick with the tongues for now. However, I've used the spiky sqweeler on my male sub's balls as a form of tickle torture and he loves it, so there ya go